Rod Evans wrote:
> Alan Coopersmith wrote:
>> Specifically, when building the Xorg loadable driver modules,
>> in order to use -z defs, I've been including a mapfile listing
>> all the exported symbols from the Xorg binary like this:
>>
>> AbortDDX = FUNCTION extern;
>> AbortServer = FUNCTION extern;
>> Acc = DATA extern;
>>
>> should those specify parent instead of extern? Would that
>> cause direct bindings for those symbols if building with -B direct ?
>
> When combined with direct bindings, "parent" instructs ld.so.1 to look
> for the reference symbol in the parent of the object that makes the
> reference. ld.so.1 will look nowhere else.
So I tried an Xorg build using "parent" instead of "extern" - and while it
built, at runtime it couldn't find a number of symbols in dlopen()ed modules
with direct bindings to parent until I started Xorg with LD_NODIRECT=1.
For instance:
dlopen: ld.so.1: Xorg: fatal: relocation error: file /usr/X11/lib/modules/input/
amd64//kbd_drv.so: symbol noXkbExtension: referenced symbol not found
Running with various LD_DEBUG flags:
25777: BASE: 1: file=/usr/X11/lib/modules/input/amd64//kbd_drv.so; dlopen() cal
led from file=/usr/X11/bin/amd64/Xorg [ RTLD_LAZY RTLD_GLOBAL RTLD_GROUP RTLD_W
ORLD ]
25777: BASE: 1: in R_AMD64_GLOB_DATA 0x140c0
0x0 noXkbExtension
25777: BASE: 1: ld.so.1: Xorg: fatal: relocation error: file /usr/X11/lib/module
s/input/amd64//kbd_drv.so: symbol noXkbExtension: referenced symbol not found
% elfdump /usr/X11/lib/modules/input/amd64//kbd_drv.so | grep noXkbExtension
[2] 0x0000000000000000 0x0000000000000000 OBJT GLOB D 0 UNDEF
noXkbExtension
[117] 0x0000000000000000 0x0000000000000000 OBJT GLOB D 0 UNDEF
noXkbExtension
[2] noXkbExtension
[24] 0x00000000000140c0 0x0000000000000000 R_AMD64_GLOB_DATA
noXkbExtension
[2] DB <parent> noXkbExtension
R_AMD64_GLOB_DATA 0x140c0 0 .SUNW_reloc
noXkbExtension
% elfdump /usr/X11/bin/amd64/Xorg | grep noXkbExtension [1360]
0x0000000000815f48 0x0000000000000004 OBJT GLOB D 0 .bss
noXkbExtension
[5602] 0x0000000000815f48 0x0000000000000004 OBJT GLOB D 0 .bss
noXkbExtension
[2767] 0x0000000000815f48 0x0000000000000004 OBJT GLOB D 0 .bss
noXkbExtension
[1360] noXkbExtension
[1360] DB <self> noXkbExtension
(The test system is running nv_64 if that matters.)
Any idea what I've done wrong here?
--
-Alan Coopersmith- alan.coopersmith at sun.com
Sun Microsystems, Inc. - X Window System Engineering
